Some "highly compressed" Xbox 360 games come as an .exe repack (similar to FitGirl for PC). When you run it:
Websites that focus on "re-packs" for console emulation (Xenia emulator) are the best source. Look for tags like: xbox 360 games iso highly compressed
Use (God image) or Extract-XISO to turn your extracted ISO into a playable emulator folder. Some "highly compressed" Xbox 360 games come as an
: Commonly used for multi-part downloads (splitting one large game into many 500MB files). Risks and Considerations xbox 360 games iso highly compressed